Volume 93, Issue 3 pp. 500-510
Research Article

Plasma Metabolites Link Dietary Patterns to Stroke Risk

Varun M. Bhave BA

Varun M. Bhave BA

Harvard Medical School, Boston, MA, USA

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Zsuzsanna Ament PhD

Zsuzsanna Ament PhD

Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA

Department of Neurology, Massachusetts General Hospital, Boston, MA, USA

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Amit Patki MS

Amit Patki MS

Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

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Yan Gao MPH

Yan Gao MPH

The Jackson Heart Study, University of Mississippi Medical Center, Jackson, MA, USA

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Naruchorn Kijpaisalratana MD, PhD

Naruchorn Kijpaisalratana MD, PhD

Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA

Department of Neurology, Massachusetts General Hospital, Boston, MA, USA

Division of Neurology, Department of Medicine and Division of Academic Affairs, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand

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Boyi Guo MS

Boyi Guo MS

Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

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Ninad S. Chaudhary PhD

Ninad S. Chaudhary PhD

Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

The University of Texas Health Science Center at Houston, Houston, TX, USA

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Ana-Lucia Garcia Guarniz MD

Ana-Lucia Garcia Guarniz MD

Department of Neurology, Massachusetts General Hospital, Boston, MA, USA

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Robert Gerszten MD

Robert Gerszten MD

Department of Medicine, Beth Israel Deaconess Medical Center, Boston, MA, USA

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Adolfo Correa MD, PhD

Adolfo Correa MD, PhD

The Jackson Heart Study, University of Mississippi Medical Center, Jackson, MA, USA

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Mary Cushman MD, MS

Mary Cushman MD, MS

Department of Medicine, Larner College of Medicine at the University of Vermont, Burlington, VT, USA

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Suzanne Judd PhD

Suzanne Judd PhD

Department of Biostatistics, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

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M. Ryan Irvin PhD

M. Ryan Irvin PhD

Department of Epidemiology, School of Public Health, University of Alabama at Birmingham, Birmingham, AL, USA

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W. Taylor Kimberly MD, PhD

Corresponding Author

W. Taylor Kimberly MD, PhD

Harvard Medical School, Boston, MA, USA

Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA

Department of Neurology, Massachusetts General Hospital, Boston, MA, USA

Address correspondence to Kimberly, Harvard Medical School, 55 Fruit Street, Lunder 644, Boston, Massachusetts, 02114, USA. E-mail: [email protected]

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First published: 14 November 2022
Citations: 12

Abstract

Objective

While dietary intake is linked to stroke risk, surrogate markers that could inform personalized dietary interventions are lacking. We identified metabolites associated with diet patterns and incident stroke in a nested cohort from the REasons for Geographic and Racial Differences in Stroke (REGARDS) study.

Methods

Levels of 162 metabolites were measured in baseline plasma from stroke cases (n = 1,198) and random controls (n = 904). We examined associations between metabolites and a plant-based diet pattern previously linked to reduced stroke risk in REGARDS. Secondary analyses included 3 additional stroke-associated diet patterns: a Mediterranean, Dietary Approaches to Stop Hypertension (DASH), and Southern diet. Metabolites were tested using Cox proportional hazards models with incident stroke as the outcome. Replication was performed in the Jackson Heart Study (JHS). Inverse odds ratio-weighted mediation was used to determine whether metabolites mediated the association between a plant-based diet and stroke risk.

Results

Metabolites associated with a plant-based diet included the gut metabolite indole-3-propionic acid (β = 0.23, 95% confidence interval [CI] [0.14, 0.33], p = 1.14 × 10−6), guanosine (β = −0.13, 95% CI [−0.19, −0.07], p = 6.48 × 10−5), gluconic acid (β = −0.11, 95% CI [−0.18, −0.04], p = 2.06 × 10−3), and C7 carnitine (β = −0.16, 95% CI [−0.24, −0.09], p = 4.14 × 10−5). All of these metabolites were associated with both additional diet patterns and altered stroke risk. Mediation analyses identified guanosine (32.6% mediation, p = 1.51 × 10−3), gluconic acid (35.7%, p = 2.28 × 10−3), and C7 carnitine (26.2%, p = 1.88 × 10−2) as mediators linking a plant-based diet to reduced stroke risk.

Interpretation

A subset of diet-related metabolites are associated with risk of stroke. These metabolites could serve as surrogate markers that inform dietary interventions. ANN NEUROL 2023;93:500–510

Potential Conflicts of Interest

Nothing to report.

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